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ALUNITE

Miscellaneous

• Family: Raw Mineral
• Region: None
• Mined At: Unspecified
• Raw Mineral: Yes
• Generic: No

Notes

(Richard Willis)

Mineral, of the ideal form KAl₃[(OH)₆][(SO₄)₂] with a typical empirical analysis of K₂O 11.4%, Al₂O₃ 37%, SO₃ 38.6%, H₂O 13%
Hardness: 3.5-4 Density: 2.7-2.8 Not fusible
Also, but not frequently, spelled alum-ite. Prime material for obtaining aluminum. A hydrous sulfate of aluminum and potassium, which should be calcinated before use, particularly for refractory clay products. Since it resists fusion, rarely of use in glaze compositions. Post-volcanic, metamorphic/sedimentary.

Authors

• Richard Willis (Owner)

XML

<?xml version="1.0" encoding="UTF-8"?>
<material name="ALUNITE" descrip="" generic="0" rawmineral="1" searchkey="Alum Rock" loi="0.00">
<families>
<family name="Raw Mineral"/>
</families>
<notes>
<note>Mineral, of the ideal form KAl&lt;FONT SIZE=2&gt;&lt;SUB&gt;3&lt;/SUB&gt;&lt;/FONT&gt;[(OH)&lt;FONT SIZE=2&gt;&lt;SUB&gt;6&lt;/SUB&gt;&lt;/FONT&gt;][(SO&lt;FONT SIZE=2&gt;&lt;SUB&gt;4&lt;/SUB&gt;&lt;/FONT&gt;)&lt;FONT SIZE=2&gt;&lt;SUB&gt;2&lt;/SUB&gt;&lt;/FONT&gt;] with a typical empirical analysis of K&lt;FONT SIZE=2&gt;&lt;SUB&gt;2&lt;/SUB&gt;&lt;/FONT&gt;O 11.4%, Al&lt;FONT SIZE=2&gt;&lt;SUB&gt;2&lt;/SUB&gt;&lt;/FONT&gt;O&lt;FONT SIZE=2&gt;&lt;SUB&gt;3&lt;/SUB&gt;&lt;/FONT&gt; 37%, SO&lt;FONT SIZE=2&gt;&lt;SUB&gt;3&lt;/SUB&gt;&lt;/FONT&gt;&lt;SUB&gt; &lt;/SUB&gt;38.6%, H&lt;FONT SIZE=2&gt;&lt;SUB&gt;2&lt;/SUB&gt;&lt;/FONT&gt;O 13%
Hardness: 3.5-4 Density: 2.7-2.8 Not fusible
Also, but not frequently, spelled &lt;B&gt;&lt;I&gt;alum-ite&lt;/I&gt;&lt;/B&gt;. Prime material for obtaining aluminum. A hydrous sulfate of aluminum and potassium, which should be calcinated before use, particularly for refractory clay products. Since it resists fusion, rarely of use in glaze compositions. Post-volcanic, metamorphic/sedimentary.

</note>
</notes>
</material>

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